Generally though, the issue is mentioned in a broader context than just "someone did a bad thing with the internet", and more that the community behind Bitcoin, and the libertarian philosophies which guide it, give rise to the scams and dark market uses of the currency.

When evaluating and discussing any technology, you're absolutely right: it is unfair to criticize it based on a few bad examples.

However, it is fair to look at a technology and consider whether the "legal" outweigh the "illegal" ones, and if not, why.

The author makes this point succinctly.